Radio apparatus



Aug. 18, 1931. J. LYoNs, JR

RADIO APPARATUS.

Filed Jan. 28, 1927 2 Sheets-Sheet l` i /2 Zin/vanto@ JA M55 L mvg, JH?

V @Wozu/m1 Aug. 18, 1931. J. LYoNs, JR 1,819,905

` RADIO APPARATUS Filed Jan. 28, 1927 2 Sheets-Sheet 2 gym/nio@ JA M55 rmi, JH?,

M 6151501 mm1 Patented Aug. 18, 1931 UNITED STATES PATENT OFFICE Imm LYONB, JB. F NEW YORK, N. Y., ASSIGNOR 0F ONE-HALF T0 LAWRENCE W. LUELLEN, OF MOUNTAIN LAKES, NEW JERSEY RADIO APPARATUS Application led January 28, 1927. Serial No. 164,313.

This invention relates to improvements in electrical apparatus, and more particularly to devices for effecting variable control of si al carrier potentialties.

he primary object in view` is precision of control, and amore detailed object 1s ease ands eed of control actuation without sacriice of precision.

A still further object is improvement in dual actuation of controls as disclosed in my co-pending application filed May 18, 1925, Serial No. 31,056.

With these and further objects in view, as

will in part hereinafter become apparent and g5) in part be stated, the invention includes multiple actuating means assembled in a single unit and adapted'to serve as a general actuatin dial and as a precision actuator.

T e invention also comprises an actuating knob or dial for general control actuations, and means geared thereto to move therewith and independent thereof for refinement of control actuations.

The invention further comprises a gen- 25 eral control actuator, and a plurality of precision control actuators carried thereby.

The invention still further comprises certain other novel constructions, combinations and arrangements of parts as will become apparent hereinafter and be subsequently pointed out in the appended claims.

In the accompanying drawings,-

Figure 1 is a longitudinal, vertical, central section through an embodiment of the invention, parts being broken away, and the central shaft being seen in elevation.

Figure 2 is a front end view thereof.

Figure 3 is an edge view thereof, parts being broken away.

Figure 4 is a somewhat diagrammatical view of the invention as applied to an organized radio receiving apparatus.

Figure 5 is a sectional plan, somewhat diagrammatical, of a modified embodiment.

Figure 6 is a diagrammatical plan of a further modified embodiment.

Referring to the'drawings by numerals, 1 indicates a knob or handle, such as a dial of a radio receiving apparatus", the knob be- I0 ing rotatably mounted on a shaft 2, journalled in the walls 3, 3, of a cabinet of other container. Wall 3 against which the rear face of knob 1 rests is usually the panel of the radio receiving set, but may be any appropriate part of any apparatus to which the invention has been applied or is adapted tobe applied. v l Y Freely rotatably mounted on shaft 2, is a hollow shaft or sleeve 4, and freely rotatably mounted on shaft 4 is a hollow shaft or 60 sleeve 5, all of the shafts 2, 4, and 5 being concentric. The knob' 1 is hollow and the outer ends of shafts 2, 4, and 5 extend into the knob, and fixed to each shaft is a worm gear 6 within knob 1. Shaft 2 is engaged 65 by knob 1 as a support 4while leaving the shaft free to rotate independently of the knob. Three actuating shafts 7 extend into knob 1,' one for each worm gear 6, and each tangentially of the circle described b the periphery of the respective gear 6. lflach shaft 6 carries a worm 8, preferably slidingly keyed to the shaft for facility of assembla e or dismantling, but susceptible of being xed to rotate the shaft in any acceptable manner. Each Worm 8 meshes with its respective gear 6, and the several shafts 7 are s aced referably equidistant about knob 1. haftsg may be more closely spaced or otherwise as found desirable in any particso ular construction. Each shaft 7 is preferably provided with an exposed, knurled head 9 to facilitate rotation, and each shaft 7 is located transversely of the axes of rotation of knob 1 in planes differing from the planes 8i occupied by the other two shafts 7, and corresponding to the planes occupied by its res ective'gear 6.

s each shaft 7 finds bearing in knob 1 just beyond the ends of its respective worm 8, the several worms 8 and shafts anchor the knob 1 and the several gears 6 together for unitary movement when knob 1 is the actuator, but each gear 6 is adapted for actuation independently of the other two and of knob 1 lwhen the respective shaft 7 is rotated. Hence any variable devices connected to the several shafts 2, 4, and 5, may be actuated thereby simultaneously and uniformly by rotation of knob 1, and then each such variadjustments, and each shaft 7 and actuated parts comprise a final or precision control for the finishing and minute adjustments.

In Figure 4 is illustrated the application of the invention to radio receiving apparatus in which one knob 1 and its cooperating parts are geared by sprockets 10, 10, (fixed tothe respective shafts 2, 4, and 5) andchains `11, 11 with similar sprockets 12, 12-xed to the shafts of variable capacities, such as the variable condensers 13, 13. Condensers 13 are parts similarly numbered in the drawings with variable inductances, such as the varidescribed and seen in detail in Figure 1. The

shafts in this embodiment are shortened for convenience and fixedly carry pulley wheels 10', 10 instead of sprockets 10. Obviously, sprockets could be used if the cables hereinafter mentioned were sprocket chains. The

knob 1 in this embodiment has rear face contact with a hollow slide block 15, within which the pulleys 10' are mounted. Block 15 is slidingly mounted in a guideway 16, similar to the guideway of the control slide block of my above-identified co-pending application. Attached to each pulley 10 is a limp'ly flexible cable 11. Each cable 11 extends through guiding devices 12 to the movable unit of a variable condenser or other variable device 13 adapted for operation as shown in detail in the above-identified copending application. It will be observed that it is an important feature of the characteristics of the chain 11 and cable 11 that each is flexible in the sense of being limp, so

that the parts may be accurately adjusted and remain at any given point of adjustment. From the showing in Figure 5, it is clear that knob 1 may be rotated and thus wind cables 11 on pulleys 10 for the general control, or knob 1 may be used as a handle to pull slide block 15 along guideway 16 for the general control actuation of elements 13', and after the general actuation, whether accomplished one way or the other, the final or refined adjustment control may be effected by rotation of shafts 7.

In Figure 6 is shown an embodiment differing from either of the two units of Figure 4 essentially in the provision of a knob l for each variable factor 13a identical with knob 1 except that only one worm gear and Worm is arranged in each knob 1, instead of three each as in knob 1, and the worm is carried by a shaft 7a identical `with any of shafts 7. The shaft 2a of the worm gear actuated by shaft 7a of each knob 1a is the shaft of the respective variable factor 13, and the middle Ione, as seen in Figure 6, is provided with a .pair of sprockets 10a connected by sprocket illustratively shown, and the other knobll ofi;

Figure 4 has its shafts similarly geared by-r' chains 11l with sprockets 10b on the end shafts 2, as seen in Figure 6. Thus, when any one of the knobs 10l is given general control actuation, all factors 13a are adjusted exactly alike, and then each may be given its final or rened adjustment by rotation of the respective shaft 7a.

It is well known in the art of radio apparatus that where a plurality of variable factors are connected to act in unison fairly good results may be obtained where nicety of selectivity is not an important desideratum, but with ever increasing broadcasting and proportional approach of Wave lengths, refined adjustment becomes a very desirable feature, and the present invention not only provides for the greatest precision of refinement of individual adjustments, but also effectively retains the parts in their relative positions as adjusted.

What is claimed is 1. In apparatus of the class described, the combination, with .a plurality of condensers, of a single general control device therefor, a plurality ofa gears carried by the lo; general control device, and independently movable means for actuating the gears for effecting refinement control.

2. In apparatus of the class described, the combination of a single general control device, a plurality of refinement controlv devices, and a plurality of nested shafts connected to be actuated simultaneously by the general control device, and means for transmitting motion from the refinement control devices to each of the shafts individually while the general control device is stationary.

3. In apparatus of the class described, the combination of a single general control device, a plurality of shafts extending thereun from and adapted to be actuated by the general control device, and a plurality of refinement control devices carried by the general control device and each connected to transmit motion to one of the shafts while lai the gpneral control device is stationary.

4., n apparatus of the class described, the combination of a hollow knob, shafts extending therefrom, gears within the knob connected to the shafts, and means carried by 1 the knob for actuating the gears independently of the knob and connecting the knob to the gears for transmitting motion from the knob to the gears.

5. In apparatus of the class described, the combination with a hollow knob adapted to be rotatably mounted, of worm gears journalled in the knob coaxial therewith, worms meshing with the gear, andactuatin shafts for the worms journalled in the kno 6. In apparatus of the class described, the combination of a plurality of nested shafts, gears connected tothe shafts, an actuating housing enclosing the gears, and means engaging the housing and the gears for transmitting motion from the housing to the gears and for actuating the gearsindependently of the housing.

7. In radio apparatus, the combination of a general control, a refinementcontrol carried thereb and motion transmitting means of textile-like flexibility connected to be actuated by both the general control and the refinement control. y

8. In apparatus of theclass described, the combination of a plurality of nested shafts, ears connected to the shafts, an actuating housing enclosing the gears, means engaging the housing and gears for transmitting motion from the housing to the gears and for actluating the gears lndependently of each ot er.

9. In apparatus ofthe class described, the

combination of a hollow, unitary, control i knob, a plurality of independent actuators mounted within said knob, and means connecting the knob to the enclosed actuators for imparting simultaneous actuation to all of said independent actuators as a unit.

' 10. In apparatus of the class described, the combination of a hollow unitary, control knob, a plurality of inde endent actuators mounted within said kno and means for actuating the independent actuators connecting the knob to said actuators for imparting simultaneous actuation to all of 'said actuators as a unit when the knob is actuated.

11. In apparatus of the class described, the combination of a hollow knob, a lurality of independent actuators mounted t erein, and actuating means for said actuators extending through portions of the knob and adapted to be operated independently for vindependent operation of the actuators and also adapted to transmit motion fromI the knob simultaneously to all said actuators when the knob is moved.

In testimony whereof I aix m si JAMES LYSN ature. 

